package com.teach.filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

//@WebFilter("/admin/*")
public class AdminFilter implements Filter {
  @Override
  public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
    HttpServletRequest request = (HttpServletRequest) servletRequest;
    HttpServletResponse response = (HttpServletResponse) servletResponse;
    if(request.getSession().getAttribute("auth")==null){//没有登录
      response.sendRedirect(request.getContextPath()+"/login.html");
    }else {
      filterChain.doFilter(request, response);//执行原有资源
    }
  }
}
